"Although it is a bit strange, blood can be utilized to create strong concrete or bricks for onsite construction on Mars," the researchers wrote. "...the combination of tears, blood, and sweat from the inhabitants, along with Martian regolith, can be used to produce a concrete known as AstroCrete."
"Scientists have been trying to develop viable technologies to produce concrete-like materials on the surface of Mars, but we never stopped to think that the answer might be inside us all along," said Aled Roberts, from the University of Manchester.
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